dan lothian with the president this evening, thanks so much, dan. >>> and go ahead. >>> foreign policy battle continues right here in the "situation room" later this hour with a top adviser from each campaign to join us live. looking forward to that. >> two senior representatives from both campaigns. >> yep. >>> we're also following two chinese telecommunications giants, both labeled potential threat to u.s. national threat. we have details of a warning coming in from the house intelligence committee. dad vo: ok, time for bed, kiddo. lights out. ♪ (sirens) (train horn) ♪ vo: wherever our trains go, the economy comes to life. norfolk southern. one line, infinite possibilities. >>> there are two of the biggest telecommunications companies in the world and u.s. lawmakers are warning they may be trojan horses for the chinese government and a possible cyber war. our foreign affairs correspondent jill dougherty is following the story for us. jill, what exactly is the house intelligence committee saying about these chinese companies? >> reporter: well, start with what they're not saying,